package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Param;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.http.HttpRequest;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private CategoryService categoryService;
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);
        /**
         * 保存菜品，清空缓存
         */

     /*   //清理所有的菜品数据
        Set key = redisTemplate.keys("dish_*");
        redisTemplate.delete(key);   */

        //清理某个分类下面的缓存书库
        String key = "dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");

    }

    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){
        //构造分页制造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name!=null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();
            //根据id分类对象
            Category category = categoryService.getById(categoryId);

            if (category!=null){
                String name1 = category.getName();
                dishDto.setCategoryName(name1);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get (@PathVariable Long id){
     DishDto dishDto  =  dishService.getByIdWithFlavor(id);
     return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update (@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        /**
         * 更新菜品。清理缓存
         */
        //清理所有菜品的缓存数据
        Set key = redisTemplate.keys("dish_*");
        redisTemplate.delete(key);

/*        //清理某个分类下的菜品数据
        String key = "dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);        */
        return R.success("修改菜品成功");
    }


    /**
     * 删除菜品
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> ids(@RequestParam List<Long> ids){
        //查询套餐状态，确定是否可以删除
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Dish::getId,ids);
        //确定菜品是否为起售状态
        queryWrapper.eq(Dish::getStatus,1);
        dishService.remove(queryWrapper);
        return R.success("删除成功");
    }


    /**
     * 根据条件查询对象的菜品信息
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;
        //动态构造key
        String key = "dish_"+dish.getCategoryId()+"_"+dish.getStatus();
        //先从redis中获取宦缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);

            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，讲查询到的菜品缓存到redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }

    /**
     * 菜品停售/起售
     * @return
     */
    @PostMapping("/status/0")
    public R<String> updateS1 (@RequestParam List<String> ids){

        //遍历获取到的ids
        for (String id : ids) {
            //讲String类型的id转成Long类型
            long l = Long.parseLong(id);
            //获取取到id的菜品
            Dish dish = dishService.getById(l);
            //将菜品的状态修改
            dish.setStatus(0);
           // Dish byId = dishService.getById(dish);
            //通过id修改菜品的状态
            dishService.updateById(dish);
        }

        return R.success("修改成功");
    }

    /**
     * 菜品停售/起售
     * @return
     */
    @PostMapping("/status/1")
    public R<String> updateS2 (@RequestParam List<String> ids){

        //遍历获取到的ids
        for (String id : ids) {
            //讲String类型的id转成Long类型
            long l = Long.parseLong(id);
            //获取取到id的菜品
            Dish dish = dishService.getById(l);
            //将菜品的状态修改
            dish.setStatus(1);
          //  Dish byId = dishService.getById(dish);
            //通过id修改菜品的状态
            dishService.updateById(dish);
        }

        return R.success("修改成功");
    }






}
